Manufacture of filaments, threads, etc.



Patented Aug. 15, 1933 UNITED STATES MANUFACTURE OF FILAMENTS, THREADS,

ETC.

Richard Elssner and Harold L. Johnson, Elizabethton, Tenn., assignors to American Glanzstoff Corporation, New York, N. Y., a Corporation of Delaware No Drawing. Application April 1, 1933 Serial No. 664,026

13 Claims. (01. 108-40) In a copending application, Serial Number 635,604, filed September 30, 1932, there has been set forth and claimed the advantages arising from the use of diphenyl as a delustering agent for viscose solutions. The present application is a continuation of this process in which the good results obtainable from a mixture of diphenyl and naphthalene, are set forth.

The present application has for its object a process for use in the manufacture of artificial filaments.

More especially, the invention refers to a meth od for producing filaments, thread, yarn, etc., from cellulosic solutions, said products possessing a reduced, soft, or low lustre.

One object of the present invention is to produce a product,as noted above, which will possess a more uniform and more desirable soft lustre than any of the hitherto known products.

Another object is to produce such a product so that the yarn so made will possess improved physical properties over the ordinary dull lustre yarn.

A further object lies in the production of a spinning solution allowing better spinning and wherein the danger of recrystallization is obviated.

In the copending application, above noted, the use of diphenyl, alone, as a delustrant for viscose or xanthate solutions is set forth. Several advantages have been found to arise, however, when both diphenyl and naphthalene are used in the stead of diphenyl alone.

First of all, as will be shown from the figures given infra, a better control of the softness of lustre is possible from our present combination of delustrants.

Further, the use of the two compounds together results in a better dispersion of the particles in the resultant filaments, threads, films, etc. This gives 1. better breaking strength, 2. better spinning, and 3. less recrystallization.

A better strength will evidently result since no discontinuous filaments will be produced, and no weakened portions of filaments will exist. This even distribution of the particles throughout the solution will also make a more even spinning possible.

Ordinarily, in the manufacture of soft or low lustre filaments, threads, yarns, etc., from cellulosic spinning solution, substances are, added to the spinning solutions and remain in the finished product after extrusion. In the present instance,

; a spinning solution of viscose, cuprammonium or organic cellulose is made up and the delustrants added, the resulting solution possessing improved properties, since the dangers of recrystallization in the solution, of clogging of the spinnerette, etc., are eliminated.

Diphenyl (CSH5)2,3.I1d naphthalene (C1oHe) are used in the present instance.

Diphenyl, known also as phenyl-benzol and biphenyl, has a melting point of 71 C., and a boiling point of 254 C. The methods of forming this substance are well known, and need not be set forth here. See, for example, Berthelot, Zeitschrift fuer Chemie, 1866, page 707; Berichte der deutschen chemischen Gesellschaft, volume 9, page 547; Liebigs Annalen der Chemie, volume 230, page 5; and Fittig, Annalen der Chemie, volume 121, page 363.

Naphthalene, with a melting point of 79 and a boiling point of 218 is also well known, and its preparation need not be set forth since it is described, for example, by Fritsche in the Jahresbericht fuer die Fortschritte der Chemie, 1857, page 456.

The two compounds are ground together until a very fine powder is formed. This powder is then dissolved in benzene, and added to the spinning solution.

As an alternative method, wherein a better soft lustre is obtained, the two compounds may be first melted together, at a temperature above 79 (3., cooled, and then pulverized and added as set forth above.

Varying percentages of the ingredients may be employed, as indicated below:

Diphenyl Plus Naphthalene Dissolved in 1.7 7 Plus 77 Gem 2.7%; Plus 39% 0611 3.3% Plus 7% Q0115 4. 5% Plus 5% 0011s 5. 5% Plus 5% 0611501 tion of soft lustre filaments, yarn, etc., is made up by adding either to the lye or to the formed spinning solution a solution comprising 1.7% diphenyl, and 7% naphthalene, finely divided, in 7% of benzene. I

Example II.--As in Example I, except that the 1 diphenyl and naphthalene were first melted toloo gether, cooled and then ground or pulverized before dissolving in the benzene.

. Other organic solvents may be employed, such as monochlorbenzol, C6H5C1, and carbondisulphide, carbon tetrachloride, and alcohol.

Example III.--A cuprammonium solution is made up and filtered in the customary manner. Prior to the spinning, however, 7% of benzene containing 1.7% diphenyl and 7% naphthalene is added to the solution. The percentages are calculated on the cellulose content of the cuprammonium solution.

The invention having been set forth as required by the patent statutes, what is claimed is:

1. A cellulose spinning solution for use in the manufacture of filaments, yarn, etc., comprising a cellulose compound in a solvent to which is added diphenyl and naphthalene.

2. A viscose spinning solution containing diphenyl and naphthalene.

3. A viscose spinning solution containing diphenyl and naphthalene dissolved in an organic solvent. 7

4. A cuprammonium spinning solution containing diphenyl andnaphthalene.

5. A cuprammonium spinning solution containing lessthan 6% of vdiphenyl and less than 7% of naphthalene, the percentages being calculated on the cellulosecontent of the solution.

6. A ,viscose spinning solution containing less than 6% of diphenyland less than 7% of naphthalene, the percentages being calculated on the cellulose content of the solution.

7. As a spinning solution for soft lustre filamerits, an alkali cellulose containing from 1.7 to 5.5% of diphenyl and 3 to 7% of naphthalene, the percentages being calculated on the cellulose content of the solution.

8. A cuprammonium spinning solution containing less than 6% of diphenyl and less than 7% of naphthalene dissolved in an organic solvent, the percentages being calculated on the cellulose content of the solution.

9. As a spinning solution for soft lustre filaments,"an alkali cellulose containing from 1.7 to 5.5% of diphenyl and 3 to 7% of naphthalene dissolved in an organic solvent, the percentages being calculated on the cellulose content of the "solution.

10. A viscose solution containing at least 1.7% of diphenyl and at least 3% of naphthalene, dissolved in benzene, calculated on the cellulose content of the solution.

11. An artificial filament having incorporated in and Widely dispersed throughout its mass material a small quantity of diphenyl and naphthalene.

12. A viscose filament having incorporated in and widely dispersed throughout its mass material a small'quantity of diphenyl and naphthalene.

13. A cuprammonium filament having incorporated in and widely dispersed throughout its mass material a small quantity of diphenyl and naphthalene.

RICHARD ELSSNER. HAROLD L. JOHNSON. 

